new enigmas for solution. 117 



The following have not yet been found in this 

 Country, but are still Unsolved Problems in 

 Natural Science. 



39. A Coleophora larva on Potentilla cinerea, collected 

 at Mombaeherhaide by Senator von Heyden, Herr Schmid 

 and myself; none were reared. 



40. A Coleophora larva on a species of clover, feeding on 

 the upper side of the leaves and making conspicuous white 

 blotches ; the case is smooth, slightly curved, darkest at the 

 tip, where it is brown ; at the mouth part it is dull-ochreous. 

 I found one at Mombaeherhaide, but did not rear it. 



41. A Gelechial larva, long and thin, of a pale dull-yel- 

 lowish ; feeding on thyme, eating the leaves half through 

 from the underside, and concealing itself in tubes of sand, 

 spun together with silk : of this I received several from Pro- 

 fessor Zeller, who found them near Glogau in May ; none 

 were reared. 



42. A Gelerhia ? larva of dark-red colour, marbled with 

 whitish, making lage flat blotches in birch-leaves, and form- 

 ing inside the mines a circular cocoon. The mine and co- 

 coon very similar to those made b}^ some Coleopterous larvae ; 

 these I received from Herr Miihlig, who found them near 

 Frankfort-on-the-Main, at the end of September. 



43. A Coleophora on birch, found at the same time, with 

 a case curved and flounced, putting one rather in mind of 

 the cases of C. serenella. 



44. A Nepticula larva, found near Ratisbon by Herr 

 Hofmann in October, in the leaves of Ayrimonia Eupatoria, 

 forming its cocoon inside the mine. 



45. A Nepticula larva, mining the leaves of Convolvulus 

 Sepium and C. arvensis at the end of September. 



